Fix versions in Upgrading Major Version

Author: BenMorel

setup/upgrade_major.rst

@@ -135,16 +135,16 @@ starting with ``symfony/`` to the new major version:
         "...": "...",
 
         "require": {
-    -         "symfony/cache": "4.3.*",
-    +         "symfony/cache": "4.4.*",
-    -         "symfony/config": "4.3.*",
-    +         "symfony/config": "4.4.*",
-    -         "symfony/console": "4.3.*",
-    +         "symfony/console": "4.4.*",
+    -         "symfony/cache": "4.4.*",
+    +         "symfony/cache": "5.0.*",
+    -         "symfony/config": "4.4.*",
+    +         "symfony/config": "5.0.*",
+    -         "symfony/console": "4.4.*",
+    +         "symfony/console": "5.0.*",
             "...": "...",
 
             "...": "A few libraries starting with
-                    symfony/ follow their versioning scheme. You
+                    symfony/ follow their own versioning scheme. You
                     do not need to update these versions: you can
                     upgrade them independently whenever you want",
             "symfony/monolog-bundle": "^3.5",